Biology (Additional)

Descripción

Test sobre Biology (Additional), creado por Sian Woods el 26/05/2017.
Sian Woods
Test por Sian Woods, actualizado hace más de 1 año
Sian Woods
Creado por Sian Woods hace casi 7 años
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Resumen del Recurso

Pregunta 1

Pregunta
Which of these are characteristics of an animal cell?
Respuesta
  • Cell Wall
  • Cell Membrane
  • Cytoplasm
  • Nucleus
  • Mitochondria
  • Vacuole

Pregunta 2

Pregunta
Which of these are characteristics of a bacterium cell?
Respuesta
  • Plasmids
  • Chlorophyll
  • Chromosomal DNA
  • Nucleus
  • Flagellum
  • Cell wall

Pregunta 3

Pregunta
What does a light microscope show?
Respuesta
  • Inside of mitochondria
  • Outside of Mitochondria
  • Inside of chloroplasts
  • Outside of Chloroplasts
  • Nuclei

Pregunta 4

Pregunta
Which of these formulae are correct?
Respuesta
  • Magnification = image height / object height
  • Magnification = object height / image height

Pregunta 5

Pregunta
A stand of DNA has a...
Respuesta
  • triple helix structure.
  • double helix structure.
  • single helix structure.

Pregunta 6

Pregunta
Which of these are the correct base pairs?
Respuesta
  • Adenine-Thymine
  • Cytosine-Guanine
  • Guanine-Thymine
  • Cytosine-Adenine

Pregunta 7

Pregunta
Base pairs are joined by...
Respuesta
  • Weak hydrogen bonds
  • Strong hydrogen bonds
  • Weak hydrogen fibres
  • Strong hydrogen fibres

Pregunta 8

Pregunta
Who discovered the double helix structure?
Respuesta
  • Watson and Crick
  • Franklin and Wilkins
  • Watson and Wilkins
  • Franklin and Crick

Pregunta 9

Pregunta
Watson and Crick used this idea and their knowledge of _________ to make a model of a DNA molecule.
Respuesta
  • Base pairs
  • Amino acids
  • Proteins
  • Genes

Pregunta 10

Pregunta
Proteins are made from...
Respuesta
  • amino acids
  • hydrogen
  • Chloroplasts
  • Ribosomes

Pregunta 11

Pregunta
What is mRNA?
Respuesta
  • A single strand molecule and has the base uracil (U).
  • A double helix structure.
  • A single strand molecule and has the base adenine (A).
  • A single strand molecule and has the base cytosine (C).

Pregunta 12

Pregunta
Which is the correct order of protein synthesis?
Respuesta
  • DNA unzips, Transcription, mRNA joins a ribosome, amino acids are brought to the ribosome by tRNA, ribosome sticks them together to make a polypeptide (protein), translation.
  • Translation, DNA unzips, transcription, mRNA joins ribosome, amino acids are brought to the ribosome by tRNA, ribosome sticks them together to make a polypeptide (protein).
  • Amino acids are brought to the ribosome by tRNA, ribosome sticks them together to make a polypeptide (protein), translation, DNA unzips, transcription, mRNA joins ribosome.

Pregunta 13

Pregunta
Mutations can be...
Respuesta
  • Harmful
  • Beneficial
  • Neutral
  • All of these

Pregunta 14

Pregunta
What are enzymes? (Select two)
Respuesta
  • Biological catalysts
  • Proteins
  • Organelles
  • Cells

Pregunta 15

Pregunta
How do enzymes work?
Respuesta
  • Finds it's specific substrate that fits the active sight, the 'lock and key' mechanism.
  • Finds any substrate to react with
  • Finds two or more substrates and makes them one

Pregunta 16

Pregunta
A higher temperature means...
Respuesta
  • faster reactions.
  • slower reactions.
  • nothing.

Pregunta 17

Pregunta
If it is to hot the enzyme will...
Respuesta
  • denature.
  • denurture.
  • disconnect.

Pregunta 18

Pregunta
What does denature mean?
Respuesta
  • The enzyme alters in shape and breaks down other substrates than it usually would.
  • The enzyme loses its shape and can't break down substrates.
  • The enzyme loses its shape but continues to work.

Pregunta 19

Pregunta
What else denatures an enzyme (other than temperature)?
Respuesta
  • pH
  • Ph
  • Concentration of substrates

Pregunta 20

Pregunta
What else effects the rate of reaction of enzymes?
Respuesta
  • Concentration (to a certain extent)
  • Light intensity
  • Concentration (continually)

Pregunta 21

Pregunta
Which of the following are benefits of the Human Genome Project?
Respuesta
  • Develops new and better medicines
  • Improves forensic sciences
  • Discrimination from employers/insurers
  • Geneism

Pregunta 22

Pregunta
What are the benefits of genetic engineering? (select the answers with the correct examples)
Respuesta
  • Reduce vitamin A deficiency (golden rice with beta carotene)
  • Reduce vitamin A deficiency (with supplements)
  • Producing human insulin (human farming)
  • Producing human insulin (insulin-producing bacteria)
  • Increasing crop yield (weather resistant crops)
  • Increasing crop yield (herbicide resistant crops)

Pregunta 23

Pregunta
Which of the following show the correct method of genetic engineering?
Respuesta
  • Useful gene cut out of chromosome using bacteria, bacterium used to cut open another chromosome, useful gene inserted into cut chromosome.
  • Useful gene cut out of chromosome using enzymes, enzymes used to cut open another chromosome, useful gene inserted into cut chromosome.
  • Useful gene cut out of chromosome using microscopic knife, microscopic knife used to cut open another chromosome, useful gene inserted into cut chromosome.

Pregunta 24

Pregunta
Controversy connected with genetic engineering?
Respuesta
  • Reducing biodiversity.
  • GM crops aren't safe.
  • GM crops may not be completely safe.
  • Could effect the natural environment where it shouldn't.

Pregunta 25

Pregunta
What are human body cells?
Respuesta
  • Haploid (23 chromosomes)
  • Diploid (23 chromosome pairs)

Pregunta 26

Pregunta
Mitosis is for...
Respuesta
  • sexual reproduction.
  • asexual reproduction.
  • growth and repair.

Pregunta 27

Pregunta
Which of the following is mitosis?

Pregunta 28

Pregunta
Gametes are...
Respuesta
  • Diploid (23 chromosome pairs)
  • Haploid (23 chromosomes)

Pregunta 29

Pregunta
Zygotes are...
Respuesta
  • Diploid (23 chromosome pairs)
  • Haploid (23 chromosomes)

Pregunta 30

Pregunta
Which of the following is meiosis?

Pregunta 31

Pregunta
Cloning is an example of what?
Respuesta
  • Asexual reproduction
  • Sexual reproduction

Pregunta 32

Pregunta
This is the process of cloning mammals, what are the issues in doing so?
Respuesta
  • Reduced gene pool (fewer alleles)
  • Shortened lifespan
  • Preserves endangers species
  • Better understanding of ageing and age-related disorders

Pregunta 33

Pregunta
Cells in an embryo are...
Respuesta
  • differentiated.
  • undifferentiated.

Pregunta 34

Pregunta
Stem cells can turn into...
Respuesta
  • any type of cell.
  • specific types of cell only.

Pregunta 35

Pregunta
Positives of stem cell research?
Respuesta
  • Can be used to cure diseases (sickle cell anaemia)
  • Can be specialised to replace damaged ones
  • Embryos are potential lives so shouldn't be used.

Pregunta 36

Pregunta
Which is the correct equation for aerobic respiration?
Respuesta
  • glucose + oxygen ---> carbon dioxide + water (+energy)
  • glucose ---> lactic acid (+energy)

Pregunta 37

Pregunta
What are the reactants in photosynthesis?
Respuesta
  • carbon dioxide
  • water
  • oxygen
  • glucose

Pregunta 38

Pregunta
What are the products of photosynthesis?
Respuesta
  • carbon dioxide
  • water
  • glucose
  • oxygen

Pregunta 39

Pregunta
What are the limiting factors of photosynthesis?
Respuesta
  • Light intensity
  • Water concentration
  • CO2 concentration
  • Temperature

Pregunta 40

Pregunta
Which of the following adaptions help photosynthesis? (Some of these are written wrong)
Respuesta
  • Broad leaves
  • Chlorophyll
  • Thick
  • Small surface area

Pregunta 41

Pregunta
The movement of water molecules across a partially permeable membrane from a region of high water concentration to a region of low water concentration. What is this the description for?
Respuesta
  • Osmosis
  • Diffusion

Pregunta 42

Pregunta
Which part of a plant transports water and mineral from the roots to the rest of the plant?
Respuesta
  • Xylem
  • Phloem

Pregunta 43

Pregunta
Which part of a plant transports sugars from the leaves to growing and storing tissues?
Respuesta
  • Xylem
  • Phloem

Pregunta 44

Pregunta
What is transpiration? (Select two)
Respuesta
  • The loss of water from a plant caused by evaporation and diffusion.
  • The gain of water to a plant caused by osmosis and active transport.
  • The loss of water from a plant caused by diffusion only.
  • The gain of water to a plant caused by osmosis only.
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